Sabertooth's 20th Anniversary: Can it be fully two decades that the Sabertooth Organ Quartet has been playing the Green Mill? Apparently so, and to mark the occasion, the band will augment its regularly scheduled late-night Saturday show with a celebratory evening. 9 p.m. Friday at the Green Mill Jazz Club, 4802 N. Broadway; $12; 773-878-5552 or greenmilljazz.com

"Memories N' Time": The Muntu Dance Theatre will launch a collaboration with composer Reginald Robinson and several top Chicago musicians in a project that examines the roots of jazz, ragtime and related genres. Though the completed piece won't be unveiled until fall of 2013, this performance marks the kick-off of the project. Among the musicians: vocalist Maggie Brown, trombonist Steve Barry, saxophonist Ari Brown, drummer Avreeayl Ra, bassist Yosef Ben Israel and trumpeter Robert Griffin. The performance is presented by the non-profit Jazz Institute of Chicago as part of its ongoing JazzCity concerts in the parks. 7 p.m. Friday at LaFollette Park, 1333 N. Laramie Ave.; free; 312-427-1676 or jazzinchicago.org